Gas-liquid separation and compression/pumping units capable of being mounted in production wells and injection wells

ABSTRACT

The present application refers to individual subsea solutions to be applied in a production well for gas-liquid separation and an injection well for compression or pumping of gas or water current in subsea systems of oil exploration. Said solutions refer to a unit for gas-liquid separation mountable in a production well, which includes a unit of gas-liquid separation directly connected to an adapter base of production BAP or “Tubing Head”; and a unit for compression/pumping mountable in an injection well including a unit of compression or pumping that is directly connected to a BAP or (“Tubing Head”), the flow line having gas or water to be injected connected to the BAP or (“Tubing Head”).

FIELD OF THE INVENTION

The present invention refers to individual subsea solutions to be applied in production well for gas-liquid separation and injection well for compression or pumping of the gas or water current in subsea systems of oil exploration.

DESCRIPTION OF THE INVENTION

As depicted in FIG. 1, the present invention refers to a unit of gas-liquid separation (1) that is connected to an adapter base of production BAP or “Tubing Head” (2), or alternatively in a well head with string suspensor previously installed in the production well.

Said unit of gas-liquid separation (1) comprises also the barriers necessary to safety and control of the well, such that to discard the use of a wet Christmas tree (“X-tree”).

The unit of gas-liquid separation (1) directs the separated gas for a flow line (3) through the BAP (2) mandrel. Alternatively, the said unit of gas-liquid separation (1) may also provide the mandrel for connecting the flow line (3) to the gas outlet. Doing so, the separated liquid is sent to a second flow line through a second mandrel in the BAP. Additionally, the unit of gas-liquid separation (1) may also provide the mandrel for connecting the liquid flow line.

The application of this solution according to the present invention is specially indicated for anticipated production systems (SPA) or long duration tests (TLD). In this case, the mandrel for liquid outlet of the unit of gas-liquid separation (1) may be provided in its top, easing the connection with SPA or TLD for sending the liquid current to the surface facilities.

In the injection well, the solution according to the present invention comprises a unit of compression or pumping (4) that is directly connected to a BAP or (“Tubing Head”) (5) or to a well head with string suspensor. The flow line having gas or water to be injected may be connected to BAP or (“Tubing Head”) (5) or, alternatively, directly to the unit of compression/pumping (4). The gas or liquid is then compressed or pumped to the injector well.

It is important to note that said unit of compression/pumping (4) also has the barriers necessary for safety and for control of the well, which also makes the use of a wet Christmas tree (“X-tree”) dispensable.

As can be appreciated by those skilled in the art, the solution according to the present invention is easily applicable to scenarios with several wells where the gas and liquids produced or to be injected may be distributed through the subsea arrangement having traditional equipment, such as manifolds and PLEMs. 

1. A unit of gas-liquid separation mountable in a production well, comprising a unit of gas-liquid separation directly connected to an adapter base of production (“BAP”) or “Tubing Head”, as well as the barriers necessary for safety and control of the well, such that the use of a wet Christmas tree (“X-tree”) is dispensed with.
 2. The unit of gas-liquid separation mountable in a production well, according to claim 1, wherein the unit of gas-liquid separation is connected to a well head with a string suspensor previously installed in the production well.
 3. The unit of gas-liquid separation mountable in a production well, according to claim 1, wherein said unit of gas-liquid separation directs the separated gas to a flow line through a BAP mandrel.
 4. The unit of gas-liquid separation mountable in a production well, according to claim 1, wherein said unit of gas-liquid separation may also provide the mandrel for connecting the flow line to the gas outlet, such that the separated liquid is sent to a second flow line through a second mandrel in the BAP.
 5. The unit of gas-liquid separation mountable in a production well, according to claim 1, wherein said unit of gas-liquid separation may also provide the mandrel for connecting a liquid flow line.
 6. The unit of gas-liquid separation mountable in a production well, according to claim 1, wherein the unit of gas-liquid separation is applied in anticipated production systems (SPA) or long duration tests (TLD), the liquid outlet mandrel for the unit of gas-liquid separation is therefore provided at a top of the unit of gas-liquid separation.
 7. A unit of compression/pumping mountable in an injection well, comprising a unit of compression or pumping that is directly connected to a BAP or (“Tubing Head”), the flow line having gas or water to be injected connected to the BAP or (“Tubing Head”).
 8. The unit of compression/pumping mountable in an injection well, according to claim 7, wherein the unit of compression/pumping is directly connected to a well head with string suspensor.
 9. The unit of compression/pumping mountable in an injection well, according to claim 7, wherein said flow line having gas or water to be injected is directly connected to the unit of compression/pumping.
 10. The unit of compression/pumping mountable in an injection well, according to claim 7, wherein said unit of compression/pumping also has the barriers necessary for safety and control of the well, making the use of a wet Christmas tree (“X-tree”) dispensable. 